Purpose: In-system programming interface, signatures and page geometry.

Namespace: atmega2560::programming.

#include <atmega2560/Programming.h>
 
namespace mcu = atmega2560;
 
static_assert(mcu::programming::signature_byte_2 == 0x01, "ATmega2560 Programming definition");

These are hardware definitions, not runtime register access or initialization.

Source: ATmega2560 datasheet (DS40002211A).